Rolling mill



1935. E. w. MIKAELSON ET All. 2,011,686

I ROLLING MILL Filed May 9, 19 33 5 Sheets-Sheet 1 umlmm ug- 1 935. E.w. MIKAELSON El AL 2,011,636

ROLLING MILL Filed May 9, 1933 5 Sheets-Sheet 2 ROLLING MILL Filed May9, 1935 5 Sheets-Sheet 3 92 a? M? m Aug. 20, 1935. E. w. MIKAELSON El AL2,011,686

ROLLING MI-LL Filed May 9, 1935 5 SheetsSheet 5 Patented Aug. 20, 1935UNITED STATES PATENT OFFICE Hamilton, Chicago, Ill

., assignors to Treadwell Engineering Company, Easton, Pa., acorporation of Pennsylvania Application May 9, 1933, Serial No. 670,156

31 Claims. (01. 80-311) This invention relates to rolling mills and moreparticularly to mill'stands employed therein in which the rolls areadjustable and from which they may be readily removed.

The general object of the invention is to provide a novel and improvedrolling mill of this type.

In certain of its more specific phases the invention relates to rollingmill stands in which the rolls are vertically arranged. In a continuousmill,-that is, a mill comprising several roll stands through which thematerial to be attenuated or shaped is successively passed,it iscustomary and desirable to provide in conjunction with the usualhorizontal roll stands one or more roll stands with vertically disposedrolls. Very obviously, the grooves in these rolls are subject toconsiderable wear just as in the case of the ordinary horizontal rolls,and in order to maintain the uniform cross section of the roll'passes,provision for rapid and convenient adjustment and removal of the rollsmust be made.

In many installations, several sets of cooperating grooves of the samesize and shape are provided in the rolls of each stand so that when oneof these sets of grooves becomes worn excessively, a quick change to anew set may be accomplished by shifting the rolls endwise. One of themore specific objects of the present invention is the provision ofimprovements in the means for accomplishing this endwise shifting oradjustment.

When all of the grooves of a set of rolls have been worn down to adegree which unfits them for further use without renewal, new rolls mustbe substituted, and it is essential that the change from the old to thenew rolls be made with the least possible delay. Consequently, the rollswith their bearings and associated supporting and adjusting mechanismare sometimes mounted in a carrier frame which may be removed from theroll stand or housing as a unit by means of a crane or likeinstrumentality, and another carrier frame with new rolls alreadymounted therein inserted in its place.

To facilitate the removal of the roll supporting frame or cage, thedriving mechanism on certain existing mills is located beneath the rollsthus leaving the upper portion of the frame accessible to the crane.This type of installation has many practical objections and up to thepresent time, efforts to overcome them have not been entirelysuccessful. For example, the driving gears and spindles must beprotected from the water used to cool the rolls and from the scale thatis loosened from the bars during their passage through the mill; accessto the driving mechanism for purposes of inspection and repair isdiflicult; and the cost of excavating for and building the foundationfor such mill stands is comparatively high.

One of the principal objects of the present injustments of the rolls;novel roll bearing assemblies; and means for effecting the removal ofthe rolls from the mill stand and from the roll carrying frame.

Other objects and features of novelty will be apparent from thefollowing specification when read in connection with the accompanyingdrawings in which certain embodiments of our invention are illustratedby way of example.

In the drawings:

Figure l is a view in front elevation of a roll stand embodying theprinciples of our invention;

Figure 2 is a side view of the same;

- Figure 3 is a horizontal cross sectional view on an enlarged scaletaken on line 3-3 of Figure 1;

Figure 4 is a view in vertical transverse section of the major portionof the mill stand taken on line 44 of Figure 3;

Figure 5 is a vertical longitudinal cross sectional view of the rollstand on a scale intermediate those of Figures 2 and 4;

Figure 6 is a view similar to Figure 5 in which the roll cage is shownremoved from the housing and in position to be lifted and transported bycrane or the like; the driving means shown at the upper portion of thestand being of a slightly modified form;

Figure 'l is a horizontal cross sectional view through one of the rollbearing carrying frames on a greatly enlarged scale;

Figure 8 is a vertical sectional view through the same parts and takenon the line 8--8 of Figure 7;

- Figure 9 is a vertical cross sectional view taken on line 99 of Figure8; and

Figure 10 is a fragmentary horizontal sectional view taken on lineIll-l0 of Figure 5.

Referring to the drawings, the numeral Ill designates the roll standassembly which comprises essentially the housing H which is disposed foradjustment transversely of the direction of movement of the materialthrough the mill upon the slotted tracks or guides I2. When in adjustedposition the roll stand is adapted to be rigidly secured to the guidesI2 by means of the bolts I3 which are adapted to pass through the slotsI4 in the guides. Suitable mechanism is provided for shifting the rollstand laterally along thetracks or guides I2 and includes in the presentdisclosure the motor I5 which is mounted upon the stationary base I6.The motor I5 is adapted to drive the pinion I8 by-means of the shaft IIcoupled thereto, and the pinion I8 meshes with the gear I9 which iscarried by or forms a part of the nut20 through the center of which isthreaded the shaft 2I. One end of the shaft 2i is secured to the housingII as at 22 and is adapted to reciprocate conveniently within the hollowbase I6 of the motor installation. It will be readily understood that inaligning the roll stand pass with those of the other stands of thecontinuous mill, the roll stand is shifted laterally upon the shoes I2by means of the motor and transmission I 52I and when in the desiredposition is secured to the guides I2 by means of the bolts I3. In orderto prevent excessive movement of this shifting means, a limit switch 25is provided which may be conveniently mounted upon the housing of thegearing I8, I9 and which is connected with the rotatable nut 20 by meansof the sprocket gearing 26.

The housing II which comprises the major portion of the roll stand isprovided with the rear wall 38 and the side walls ill, the front of thehousing being open as will be readily seen from Figures 3, 5 and 6. Thefloor of the housing II is provided with guides or trackways 33 whichextend for a considerable distance beyond the open front of the housingproper and which are grooved for the reception of the sliding shoes 34upon which the roll carrying frame or cage 35 is adapted to rest duringits removal from the housing. The sliding shoes 34 are flanged at thebottom thereof and these shoes may be retained in the proper positionwith relation to the trackways 33 by means of the removable plates 31which overlie the flanges and are bolted to the tracks 33. The mechanismfor sliding the shoes 34 along the traokways will be describedhereafter. In Figures 1, 4 and 5 the'roll carrying frame or cage 35 isshown in one of the elevated positions which it may occupy duringoperation of the mill. It will be understood that the roll cage may beadjusted to various heights by suitable mechanism which will bedescribed and which serves to register the various passes or grooves ofthe rolls with those of preceding and succeeding stands ofthe mill.

In the illustrated example, the vertical rolls which are carried by thecage 35 are indicated at 40, the rolls being provided with grooves 4|which may be of any desired shape depending upon the nature of the workto be done, and each of which cooperates with the corresponding groovesof the other roll to form the passes 42. Each roll is of course providedwith a lower neck 44 and an upper neck 45, the latter being providedwith the interiorly grooved members 46 which are adapted to receive thelower ends 41 of the spindles 48 which form a part of the extensibletelescoping driving mechanism. The spindle ends 41 are of cruciform orsome other irregular shape so as to interfit with the correspondinglygrooved sockets in members 46. The end portions 41 are roundedlongitudinally as shown in Figure 4 so that the spindles may incline toa certain degree whereby the driving relation'of the spindle and rollsmay be maintained when the rolls are individually shifted laterally.

The gearing for driving the rolls is mounted upon the top of the housingII and is enclosed within the casing 50. The lower portion of the casing50 and the upper portion of the housing II are suitably formed andprovided with bearings such as indicated at 5I for the reception of thehollow shafts 52 and 53 which are adapted to receive the upper ends 54of the retractable and extensible spindles 48 and to thus formcooperating stationary portions of the telescoping driving arrangement.The hollow interior of the shafts 52 and 53 is slotted as at 55 for thereception of the spindle ends 54 which may be shaped in exactly the samemanner as the lower ends 41. Intermeshing gear teeth 57 and 58 areprovided on the shafts 52 and 53 and the shaft 53 is additionallyprovided at its upper end with the bevel gear 59. Another bevel gear 65intermeshes with the gear 59 and is keyed to the horizontally disposedshaft 8I which rotates in the bearings 62 provided in the casing 59 andis coupled as at 63 with the shaft 64 of the main driving motor 65. Abracket 66 is secured to the housing I I for supporting this motor. Itwill thus be seen that a very sturdy transmission arrangement isprovided for the roll drive which will readily accommodate itself to notonly the vertical'adjustments of the rolls but also their individuallateral adjustments.

A modified form of drive which may be adopted is shown in the upperportionof Figure 6 of the drawings in which the driving motor,designated 65, is disposed in a vertical position on top of the gearhousing 55 and is connected to the hollow shaft 53' by means of thecoupling 61. Otherwise the arrangement is as described with reference tothe other embodiment. In each case the driving mechanism is arranged inthe most convenient and accessible position at the top of the rollstand, and the rolls are disposed within the lower portion of the standrepresented by the housing I I.

As already stated, during removal of the roll carrying cage 35 from theroll stand, it is adapted to be lowered until it rests upon the slidingshoes 34 which are designed to carry it forwardly through the open frontof the housing II until it is accessible to the crane or other means bywhich it may be completely removed from the roll stand and replaced byanother cage containing a new set of rolls. The mechanism for actuatingthe sliding shoes 34 will now be described. Each of these shoes 34 isprovided with a longitudinally threaded bore which is adapted to receivethe threaded shaft III. This shaft is mounted for rotation in a suitablecasing II provided in the rear supporting bracket of the housing II andis provided with a worm wheel I2. Each of the worm wheels I2 is adaptedto be driven by a worm I3 which is keyed to the cross shaft I4 driven bythe motor I5 through the bevel gearing I6. The motor I5 and portions ofthe gearing are carried by the bracket TI which may be conveniently castintegrally with the housing II or may be otherwise secured thereto. Oneof the screw shafts I0 is extended rearwardly through its casing II andis provided with a sprocket gearing connection I9 with a limit switch 80which may be of any suitable type and which is designed to control themotor 15 so as to prevent excessive movement of the shoes 34 inwardlyand outwardly of the housing II. Figure 6 shows clearly the extendedposition of the shoes 34 carrying the roll cage 35.

In order to rigidly retain the roll cage or frame 35 in its selectedoperative positions within the housing II, the upper and lower pairs ofstuds 82 are carried by the cage and project rearwardly therefrom.Vertically extending slots are provided inthe rear wall 30 of thehousing II as indicated in dotted lines at 84 through which the studs 82are adapted to extend when the roll cage 35 is brought to its rearwardposition within the housing and adjusted vertically so that the rollpasses are in the desired alignment. Washers or collars 85 are appliedto the studs 82 and the cage is rigidly secured to the rear wall of thehousing by the gib B6 and the key 81 which are wedgingly secured withina slot provided in the stud a2.

The mechanism provided for raising and lowering the roll cage 35 willnow be described. A pair of vertically disposed screw shafts are splinedfor vertical reciprocation within the bearing members 92 which aresuitably secured to the bottom wall of the housing I I. The upper endsof these shafts are adapted to abut the hardened contact plates 9| inthe lower surface of the cage 35. Within the lower portion of each ofthe members 92 a nut 83 is disposed for rotation about a vertical axis.The nuts 93 are threaded upon the shafts 90 and are providedperipherally with the worm gear teeth 94 which are adapted to mesh withthe worms 95 carried by the horizontal shaft 96. The shaft 96 isprovided with suitable bearings in the members 02 and in a bracket 91,the latter element also being adapted to support a motor 98 which isdesigned to drive the shaft 95 through the bevel gears 99. It will beapparent from this description that when the motor 98 is energized theshaft 96 will be rotated and the vertical lifting jack shafts 90 willraise or lower the roll cage as desired.

Means are provided for retaining the spindles 48 of the telescopingdriving connections in upwardly retracted positions when the cage 35 islowered for removal from the mill stand, and comprise a pair of yokesI00, the arms of which are adapted to extend through openings in therear wall 30 of the housing II and through the inwardly projectingreinforcing ledge IOI formed thereon. At least one of the arms of eachyoke I00 is provided with a pair of openings I02 which .are adapted toregister with an opening I03 in the ledge IOI in the inner and outerpositions of the yoke respectively. When the yoke is in its outerposition as shown in Figure 5 or in solid lines in Figure 10 of thedrawings, the spindle 48 may move freely in its vertical reciprocationwithin the yoke I00 since the annular enlargement I05 may pass freelyth-erethrough. When the enlargement or shoulder I05 is raised above thelevel of the yoke I00, either manually or preferably throughthe raisingof the cage 35, the yoke I00 may be retracted rearwardly until the puteropening I02 registers with the opening I03;

shoes 34 without interference from the driving connections.

The novel construction of the roll cage 35 together with its variousassociated means for adjustably supporting the rolls 40 will now bedescribed. The main body portion IIO of the cage 35 is substantiallyU-shaped in plan as may be determined from an inspection of Figure 3 ofthe drawings and consists of the rear transverse portion III which isadapted in operation to abut the rear wall 30 of the housing II. Thevertical movement of the cage is guided by the tongue and groovearrangement II 4. This rear member III of course is provided with anopening II2 which substantially registers with the opening II3 providedin the rear housing wall 30 to permit the passage of the material to. behandled by the mill. The body member I I0 is also provided with theforwardly extending arms II5 to which is secured the substantiallyrectangular cap frame IIB. This cap frame is, of course, also providedwith an opening registering with the apertures H2 and H3 in the rearcage member III and the housing wall 30 respectively. The ends of theforwardly extending frame portions I I 5 are each provided withbifurcations within which are pivoted the lugs II8 as at II9. These lugsII8 are adapted to be received within bifurcations provided in the endsof the upper and lower horizontal cross members of the cap frame II6 asclearly shown in the cross sectional portions of Figure 3 and also inFigure 1. These lugs are provided with washers I20 and the usual gibsand keys I2I and I22 are employed to clamp the cap frame I I6 rigidly inposition upon the body member IIO of the cage 35.

Wear plates I25 are provided upon the inner surface .of the horizontalupper and lower cross members of the body frame I I0 and the cap frame II6. These wear plates provide ways upon which the roll bearing framesI21 may slide during lateral adjustment of the rolls. Each of the upperand lower roll necks 45 and 44 are carried in bearings mounted in theseframes I21. The frames I21 are provided with individual lateraladjusting means comprising the screw shafts I30 which are threadedthrough the members I 3|, the ends of these shafts being adapted to abutthe hardened inserts I32 provided in each of the bearing frames I21. Theshafts I30 are designed to urge the frames I21 inwardly toward eachother when they are rotated by the following adjusting means. Each ofthese individual adjusting means is provided with horizontally disposedshafts I35 which are provided with worms I36 which are adapted to meshwith the worm wheels I31 keyed to the ends of the shafts I30. An arm I38is provided on the shaft I35 and is provided with perforations whichregister with corresponding perforations in a stationary plate or dialto retain the shaft I35 in adjusted position.

Each of the frames IE1 is provided with half L bearings I40 and is alsoprovided with cap mem-.

hers I 4| which are secured thereto by means of the bolts I 42. Thesecap members are provided with lugs or flanges I45 which are adapted toabut the outwardly facing corners of the half bearing I40 in order toretain it within the member I21. A clamping carrier frame I50 is alsoprovided for retaining the complementary bearing portion I5I which isadapted to embrace the inner sides of the roll necks. The bearingelement I5I is retained within the clamping or carrier member by meansof the clamp plates I53 which are sccured to the inner faces of themembers I50 by means of the screws I 54. Each of the carrier members I50is provided with laterally extending ears I55 which are adapted to bereceived with adequate clearance between the corner flanges I45 of thecap member during assembly of the device, and which are provided withopenings into which the ends of the shafts I56 are threaded. The shaftsI56 pass freely through openings provided in the end arms II5 of thecage 35 and serve to resiliently urge the carrier I 50 and consequentlythe roll necks id and B5 outwardly against the ends of the adjustingshafts I30. Coiled springs I58 are disposed on the shafts forthispurpose and are received within depressions provided in the arms II5. In order to prevent rotation of the shafts or rods I56 with respectto the bearing frames I21, they are slotted as at I59 for the receptionof the keys or cotters I60 which in turn are adapted to be receivedwithin vertical slots I6I provided in the annular bosses I62 formed onthe members I21 and adapted to surround the openings through which theshafts I56 pass. This arrangement effective- 1y prevents the rods I55from rotating and thus becoming detached from the retaining members I50.Annular thrust bearing collars I65 are disposed around the roll necksbetween the enlarged body portions of the rolls and the bearing framesI21. Relative rotation between these bearings I65 and the frames I21 maybe prevented by means of the dowels I66. A suitable lubricant retainercap I10, provided with a plugged drain opening "I, may be employed toprevent the lubricant from escaping from the lower roll bearings.

Individual vertical adjustment of the rolls within the cage 35 may beeffected by means of the upper and lower clamps I12 These clamps areprovided with annular sleeve portions I13 which are coaxial with therolls and are provided with laterally extending ears I14. These ears I14are secured to the body and cap members I I and I I6 respectively of thecage 35 by means of the bolts I15, which pass through holes in the earsI14 with a slight clearance. The transverse central portions of thebottom edges of the clamps I12 are provided with the curved cam orrocker portions I15 which are adapted to bear upon the bearing carryingframes I21 and bearing caps I4I respectively. The proper downwardpressure may be brought to bear upon the members I21 and MI bytightening the nuts upon the bolts I15, and as will be readilyperceived, regardless of whether or not the nuts are equally adjustedsince the clamp members may rock to a certain extent upon the curved camportions I16. Furthermore, the clamps I12 may also rock transverselyabout the bolts, thus exerting uniform pressure on the carrying framesI21 and the bearing caps MI. The lower clamps I12 are provided withsimilar cams I16 which are adapted to bear upwardly against the caps I10which in turn are in contact with the lower bearing frames I21 and capsI4I. It will be readily seen that by adjustment of the clamps I12 at thetop and bottom of each of the rolls 40 the grooves 4| may be broughtinto proper cooperative alignment to provide the passes 42. Individualhorizontal adjustments of each end of the rolls are obtained as has beendescribed by means of the shafts I30, the forward motion of which isresisted by the resilient connections comprising the rods I56 andsprings I58 connected to the carrier I50 applied to the necks of therolls.

After the roll cage 35 is removed from the housing II by being loweredso as to rest upon the shoes 34 and carried'forwardly out of the housingby means of these shoes a suitable crane or other hoisting means isattached to the cage by means of the horizontal pins I80 which passbetween the upstanding ears I8I on the side arms II of the cage. Afterbeing transported to a suitable place the rolls 40 may be veryconveniently re! moved from the cage 35 by the removal of the front capframe I I6 of the cage 35.

Various changes and modifications may be made in the embodimentillustrated and described without departing from the scope of ourinvention as defined by the following claims.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent is:

l. A rolling mill of the class described comprising, in combination, ahousing, a roll supporting cage normally disposed within said housing,means for removing said cage from said housing in a horizontal directioncomprising a pair of separately formed shoes, slidable upon trackwaysformed in said housing, power and transmission means carried by saidhousing and operatively connected with said shoes for moving them uponsaid trackways, means for raising said cage from and lowering it uponsaid shoes comprising a pair of vertically threaded shafts adapted tocontact with a portion of said cage, and means for reciprocating saidshafts comprising power operated rotatable nuts thereon.

2. In a rolling mill of the class described, in combination, a housing,wallsclosing the two sides and rear of said housing leaving the frontthereof open, a horizontally movable roll supporting cage within saidhousing and removable through said open front of the housing, retainingmeans for said cage comprising a stud carried by said cage and adaptedto project through an opening in the rear wall of said housing, and giband key means for locking said stud to said housing wall.

3. In a rolling mill of the class described, n combination, a housing, ahorizontally removable roll supporting cage therein, means for removingsaid cage from said housing including a slidable shoe arranged forhorizontal movement into and out of said housing, a trackway associatedwith said housing upon which said shoe is adapted to move, means formoving said shoe comprising a screw shaft threaded through said shoe andheld against longitudinal movement, means for rotatingsaid shaftcomprising a power member, and operative means connecting said powermember and said shaft, and a limit switch associated with said shaft forcontrolling said power member to prevent excessive movement of saidshoe.

4. In a rolling mill of the class described, in combination, a housing,a horizontally removable roll supporting cage therein, means forremoving said cage from said housing including a slidable shoe arrangedfor horizontal movement into and out of said housing, a trackwayassociated with said housing upon which said shoe is adapted to move,means for moving said shoe comprising a screw shaft threaded throughsaid shoe and held against longitudinal movement, and means for rotatingsaid shaft.

5. In a rolling mill of the class described, in combination, a housing,a horizontally removable roll supporting cage therein, means forremoving said cage from said housing including a slidable shoe arrangedfor horizontal movement into and out of said housing, a trackway withinand projecting from said housing upon which said shoe is adapted tomove, means for placing said cage upon said shoe for removal from saidhousing, and means for moving said shoe.

6. In a rolling mill of the class described, in combination, a housing,a removable and vertically adjustable roll carrying cage normallyenclosed within said housing, power means carried by said housing foreffecting the removal of said e, and power means also carried by saidhousing for effecting the vetrical adjustment of said cage.

7. In a rolling mill of the class described, in combination, a housing,a horizontally removable roll carrying cage normally enclosed withinsaid housing, a plurality of vertically disposed rolls within said cage,and means carried by said housing for effecting the removal of saidcage.

8. In a rolling mill of the class described, in combination, a movablehousing, a removable roll carrying cage normally enclosed within saidhousing, and means carried by said housing for effecting the removal ofsaid cage from within said housing.

9. A rolling mill of the class described comprising, in combination, astationary support or foundation, a housing arranged for limited travelin a horizontal direction relative to said support, a roll supportingcage containing a plurality of rolls removably disposed within saidhousing, and power means for effecting the removal of said cage fromsaid housing also carried by the housing,

10. A rolling mill of the class described comprising, in combination, ahousing having its lower portion closed on three sides but open upon thefourth, a roll supporting cage containing a plurality of verticallydisposed rolls disposed within said housing and removable therefromthrough the opening in said fourth side, and roll driving means disposedwithin the upper portion of said housing.

11. A rolling mill comprising, in combination, a housing, a bodilyremovable roll supporting cage in said housing, a plurality ofvertically disposed rolls therein, means for moving said cagevertically, driving means for said rolls carried by said housing abovesaid rolls, and means for removing said cage from said housing in ahorizontal direction.

12. A rolling mill comprising, in combination, a housing, a bodilyremovable roll supporting cage in said housing, a plurality ofwerticallydisposed rolls therein, driving means for said rolls carried by saidhousing above said rolls including vertically disposed extensible andretractable transmission means, and means for removing said cage fromsaid housing in a horizontal direction as a unit.

18. A rolling mill comprising, in combination, a housing, a bodilyremovable roll supporting cage in [said housing, a plurality ofvertically disposed rolls therein, means for moving said cagevertically, driving means for said rolls carried by said housing abovesaid rolls including vertically disposed extensible and retractabletransmission means, said transmission means adapted to be retracted bythe upward movement of said cage, and means on said housing forretaining said transmission means in retracted position during removalof said cage.

14. In a device of the class described, in combination, a frame, adriving element, a driven 818-! ment, a longitudinally movable rotarydrive shaft associated with said driving and driven elements which iscontinually constrained to move in one direction, means for restrainingthe longitudinal movement of said-shaft comprising an annularenlargement thereupon, and a looped retaining element adjustably carriedby said frame and adapted to abut said enlargement.

15. In a rolling mill of the class described, in combination, a housing,a plurality of vertically disposed rolls, a roll carrying cage disposedin the lower part of said housing, means for bodily removing said cagefrom said housing in a horizontal direction, means for moving said cagevertically, roll driving means associated with said housing,transmission means carried by the upper portion of said housing andincluding telescoping drive shafts for the rolls, the lower portions ofsaid telescoping shafts having detachable connections with said rollsand being retractable by an upward movement of said cage, and means onsaid frame for retaining said lower portions in retracted positionswhereby, .upon again lowering said cage, it may be removed from saidhousing without interference by said transmission means.

16. In a rolling mill of the class described, a bearing frame associatedwith a neck of one of the rolls of the mill comprising a body member, ahalf bearing therein, a cap member rigidly secured to said body member,a complementary bearing element covered by said cap member and movablerelative thereto, and means for urging said bearing element against saidneck of the roll.

17. In a rolling mill of the class described, a hollow bearing frameassociated with each roll neck, a bearing portion therein, fixedrelatively thereto, and adapted to contact with one side of said neck, acomplementary bearing portion adapted to contact another side of saidneck and movable relatively to said frame, and means extendingexteriorly of said frame and resiliently abuting a relatively stationaryportion of the mill for urging said complementary bearing portion intooperative contact with said neck.

18. In a rolling mill of the class described, in combination, a rollcarrying cage having ways therein, a bearing supporting frame associatedwith each roll neck and arranged for adjustment within said cage alongsaid ways, a bearing portion on said frame and adapted to contact oneside of a neck of a roll, a complementary bearing portion movable withrespect to said frame and adapted to contact another side of said neck,means serving to resiliently connect said relatively movable bearingportion with a portion of said cage, and means for adjusting saidbearing frame along said ways in opposition to the resilient connectionof said complementary bearing portion.

19. In a rolling mill of the class described, a roll bearingconstruction comprising, in combination, a bearing frame, a half bearingdisposed in said frame, a cap rigidly secured to said frame and whichtogether with said frame is adapted said cap for retaining said halfbearing in position, a complementary bearing portion within said cap, acarrier for said complementary bearing portion within said cap, acarrier for said complementary bearing portion, clamps for securing saidbearing portion to said carrier, and connecting means secured to saidcarrier passing through said frame and resiliently connected toarelatively stationary part of said rolling mill.

2. In a device of the class described, in combinatioh, a frame, adriving element, a driven element, a vertically disposed rotary driveshaft connecting said elements and adapted to be raised in order tobreak the driving connection, means associated with said frame forretaining said shaft in raised position, said last named meanscomprising an annular sleeve like member on said shaft, and a loopedelement adjustably carried by said frame and adapted to surround saidshaft beneath said member when adjusted to retaining position.

22. In a rolling mill of the class described, in combination, a housing,a plurality of vertically disposed rolls, a roll carrying cage disposedin the lower part of said housing, means for bodily removing said cagefrom said housing in a horizontal direction, roll driving meansassociated with said housing, transmission means carried by the upperportion of said housing and including telescoping drive shafts for therolls, the lower portions of said telescoping shafts having detachableconnections with said rolls and being retractable for removal of saidcage, means for retaining said lower shaft portions in retractedposition comprising an enlargement on each of said shaft portions,U-shaped rods horizontally adjustable with respect to a wall of saidhousing and adapted to receive said shaft portions Within their bightsat points beneath said enlargements.

23. In a rolling mill of the class described, in combination, a'housing,a horizontally removable and vertically adjustable roll carrying cageadapted to be enclosed within said housing, a rest for said gage carriedby said housing, means for projecting said rest from said housing, meansalsmparried by said housing and adapted to be nioved intd' 'eontact withsaid cage to remove it from said rest and to support it in verticallyadjusted positions.

24. In a rolling mill of the class described, in combination, a housing,a horizontally removable and vertically adjustable roll carrying cageadapted to be enclosed within said housing, a rest for said cageslidably carried by said housing, power means carried by said housingfor projecting said rest horizontally from said housing, means alsocarried by said housing and adapted to be moved upwardly into contactwith said cage to raise it from said rest and to support it invertically adjusted positions.

25. In a rolling mill of the class described, in combination, a housing,a horizontally removable and vertically adjustable roll carrying cageadapted to be enclosed within said housing, a rest for said cage carriedby said housing, means for projecting said rest from said housing, meansalso carried by said housing and adapted to be moved into contact withsaid cage to remove it from said rest and to support it in verticallyadjusted positions,' said means comprising a vertically arranged screwshaft, means for restraining rotation of said shaft, an actuating nutrotatable upon said shaft means for restraining axial movement of saidnut, and power means and operative connections between said power meansand said nut.

26. In a rolling mill of the class described, in combination, aplurality of rolls each provided at its ends with bearing necks ortrunnions, a roll supporting frame comprising pairs of side membersbetween which the respective ends of the rolls are disposed, a bearingblock for each roll neck, said bearing blocks being adjustably mountedbetween said side members, a clamping yoke associated with each bearingblock for securing it in adjusted position with respect to said frame,each of said yokes adapted to extend from one side member of said pairsto the other and having its ends secured respectively thereto, curvedbosses formed on the intermediate portions of said yokes and adapted tocontact with said bearing blocks.

27. In a rolling mill of the class described, in combination, a rollprovided with a bearing neck or trunnion, a bearing block for receivingsaid neck, a roll supporting frame having parallel members between whichsaid block is adjustably disposed, means for securing said block withinsaid frame including a yoke, each of its ends adapted to be secured toone of said parallel members, whereby said yoke extends from one of saidmembers to the other, said yoke being divided intermediate its lengthand provided with rocker portions adapted to bear upon said bearingblock upon either side of said roll neck.

28. In a rolling mill of the class described, in combination, a rollcarrying frame, a roll provided with a neck or trunnion portion, abearing block provided with an opening through which said portion isadapted to extend, a cap member applied to said bearing block andadapted to cover said opening, and a clamping yoke for adjustablysecuring said block to said frame and also adapted to bear against saidcap to retain it in its position with respect to said opening.

29. A rolling mill comprising, in combination, a housing, a bodilyremovable roll supporting cage normally enclosed within said housing, aplurality of vertically disposed rolls carried by saidecage 7' anddriving means for said rolls disposed upon said housing, means wherebysaid rolls may be positively disconnected from said driving means, andmeans for removing said cage as a unit from said housing in a horizontaldirection.

30. A rolling mill comprising, in combination, a housing, a bodilyremovable roll supporting cage normally enclosed within said housing, aplurality of vertical disposed rolls carried by said cage, driving meansfor said rolls disposed upon said housing and including driving shaftssubstantially coaxial with said rolls and normally operatively connectedtherewith, means whereby said rolls may be positively disconnected fromsaid driving shafts, and means for removing said cage as a unit fromsaid housing in a direction transversely to the axes of said shafts androlls.

31. In a rolling mill of the class described, a roll stand comprising,in combination, a housing, a bodily removable roll carrying framenormally enclosed within said housing, and means within said housing forprojecting said frame from the interior of said housing.

ERIK W. MIKAELSON. ALEXANDER K. HAMILTON.

